Another One of my Weird DIY Questions

I know anal toys should have a flared base or cord for safety. But, of course, I see things without that feature which would be perfect if only they had it. So, I thought... "Aha! Maybe I can create my own!"

I wonder if adding one of the larger, stiffer vibrating rings (with or without bullets in place) to a standard vibe would be sufficient for safety. I know something squishy wouldn't be good, but something like Lover's Touch? (That was a totally random example to convey the basic idea as I don't have time to look through all right now.)